This book primarily deals with bioenergy and biofuels. It also discusses the applications and advancements in these fields. Bioenergy is a form of renewable energy which is produced by the combustion of biofuels. Ethanol, syngas, biogas, charcoal, wood, etc. are some examples of biofuels. These are the potential alternatives of fossil fuels. Scientists and researchers across the globe are constantly pushing the boundaries in this field to make biofuels as useful and productive as possible for commercial use. This book is meant for students who are looking for an elaborate reference text on the evolution of bioenergy. The readers would gain knowledge that would broaden their perspective about these renewable resources.